Is it possible both of the circuit is using the same ground GND connection?

Is it possible both of the circuit is using the same ground GND connection?

3 Answers. You have to connect them, otherwise your circuit will most probably not work. If you do not connect both grounds, the voltage between these two grounds is somewhat random (determined by surrounding air, environment,…) and your signals might not be what you intended.

Can two power sources share the same ground?

If the two power supplies share a common ground, or can be made to, then it is no problem. However, the return wire must be sized for the sum of the 8 V and 12 V currents.

Why are there multiple ground pins?

For a power connector: each pin can carry a limited amount of current. All current must return via ground. There are multiple power pins per voltage, hence multiple ground pins are needed to carry all the ground current. So ideally the number of GND wires would match the size and number of the voltage rail wires.

What if I have two ground wires?

The two ground wires must be wire-nutted together along with another 6-inch length of green or bare ground wire known as a pigtail. A grounded electrical outlet has three holes to provide a ground connection for three-prong plugged devices. Turn off the breaker controlling the outlet you’re working on.

What can happen when a wire has two different ground connections?

The reason that wiring devices have grounding connections that accept only one wire is that otherwise, if two ground wires were connected to the device, then if someone later removed that wiring device and then re-applied power without wire-nutting the grounding conductors, there would be a break in the ground path for …

What is the need for multiple VDD and GND power pads?

There are three main reasons to require multiple power and ground pins. Impedance. Chips can draw a lot of current. CMOS chips in particular (basically any modern digital IC) draw huge amounts of current for very short periods of time on every clock cycle.

Can you connect two GND togheters together?

However, if both ground are connected, voltages sources with have the same reference, and so be coherent to each other. Please mind you have to connect grounds with little resistance. So yes, most of the time you have to connect GND together.

Is it okay to connect 2 ground wires to a device?

Most screw terminals are designed for only a single wire. No you can’t. If two ground wires went to a device, like they do with hots on receptacles, then if you remove the receptacle (say for servicing), you cut that ground to downstream appliances.

Can you connect two power supply GND together?

So yes, most of the time you have to connect GND together. If you connect ground of two voltage systems like 5V and 24V then any fault in 5V will burn out other 24V lines. We in industry keep voltage groups isolated (this also safeguard minor overcurrents flowing from high voltage elements to low voltage elements).

Do you need to run multiple wires to power?

Split that single wire into switches and lights (as many as you need) You are installing 4 LEDs in your car. You have a ground and a power source. Do you need to run a wire from each LED to the power source and ground? Do you need to run 4 wires to your switch? You’ve got a basic setup with just 1 LED.